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workaround 'colocated mv if colocated block is L1 predicted' bug in x264

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Originally committed as revision 4487 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-08-01 14:47:07 +00:00
parent 5aa083eec1
commit cdd106899f
1 changed files with 67 additions and 3 deletions
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70
libavcodec/h264.c
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@ -348,6 +348,8 @@ typedef struct H264Context{
uint8_t field_scan[16];
const uint8_t *zigzag_scan_q0;
const uint8_t *field_scan_q0;
int x264_build;
}H264Context;
static VLC coeff_token_vlc[4];
@ -1276,7 +1278,8 @@ static inline void pred_direct_motion(H264Context * const h, int *mb_type){
fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, ref[1], 1);
if(!IS_INTRA(mb_type_col)
&& ( l1ref0[0] == 0 && ABS(l1mv0[0][0]) <= 1 && ABS(l1mv0[0][1]) <= 1
|| l1ref0[0] < 0 && l1ref1[0] == 0 && ABS(l1mv1[0][0]) <= 1 && ABS(l1mv1[0][1]) <= 1)){
|| l1ref0[0] < 0 && l1ref1[0] == 0 && ABS(l1mv1[0][0]) <= 1 && ABS(l1mv1[0][1]) <= 1
&& (h->x264_build>33 || !h->x264_build))){
if(ref[0] > 0)
fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mv[0][0],mv[0][1]), 4);
else
@ -1305,7 +1308,8 @@ static inline void pred_direct_motion(H264Context * const h, int *mb_type){
/* col_zero_flag */
if(!IS_INTRA(mb_type_col) && ( l1ref0[x8 + y8*h->b8_stride] == 0
|| l1ref0[x8 + y8*h->b8_stride] < 0 && l1ref1[x8 + y8*h->b8_stride] == 0)){
|| l1ref0[x8 + y8*h->b8_stride] < 0 && l1ref1[x8 + y8*h->b8_stride] == 0
&& (h->x264_build>33 || !h->x264_build))){
const int16_t (*l1mv)[2]= l1ref0[x8 + y8*h->b8_stride] == 0 ? l1mv0 : l1mv1;
for(i4=0; i4<4; i4++){
const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*h->b_stride];
@ -6830,6 +6834,64 @@ static int decode_slice(H264Context *h){
return -1; //not reached
}
static int decode_unregistered_user_data(H264Context *h, int size){
MpegEncContext * const s = &h->s;
uint8_t user_data[16+256];
int e, build, i;
if(size<16)
return -1;
for(i=0; i<sizeof(user_data)-1 && i<size; i++){
user_data[i]= get_bits(&s->gb, 8);
}
user_data[i]= 0;
e= sscanf(user_data+16, "x264 - core %d"/*%s - H.264/MPEG-4 AVC codec - Copyleft 2005 - http://www.videolan.org/x264.html*/, &build);
if(e==1 && build>=0)
h->x264_build= build;
if(s->avctx->debug & FF_DEBUG_BUGS)
av_log(s->avctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data+16);
for(; i<size; i++)
skip_bits(&s->gb, 8);
return 0;
}
static int decode_sei(H264Context *h){
MpegEncContext * const s = &h->s;
while(get_bits_count(&s->gb) + 16 < s->gb.size_in_bits){
int size, type;
type=0;
do{
type+= show_bits(&s->gb, 8);
}while(get_bits(&s->gb, 8) == 255);
size=0;
do{
size+= show_bits(&s->gb, 8);
}while(get_bits(&s->gb, 8) == 255);
switch(type){
case 5:
if(decode_unregistered_user_data(h, size) < 0);
return -1;
break;
default:
skip_bits(&s->gb, 8*size);
}
//FIXME check bits here
align_get_bits(&s->gb);
}
return 0;
}
static inline void decode_hrd_parameters(H264Context *h, SPS *sps){
MpegEncContext * const s = &h->s;
int cpb_count, i;
@ -7257,7 +7319,7 @@ static int decode_nal_units(H264Context *h, uint8_t *buf, int buf_size){
buf_index += consumed;
if( (s->hurry_up == 1 && h->nal_ref_idc == 0)
if( (s->hurry_up == 1 && h->nal_ref_idc == 0) //FIXME dont discard SEI id
||(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
continue;
@ -7308,6 +7370,8 @@ static int decode_nal_units(H264Context *h, uint8_t *buf, int buf_size){
decode_slice(h);
break;
case NAL_SEI:
init_get_bits(&s->gb, ptr, bit_length);
decode_sei(h);
break;
case NAL_SPS:
init_get_bits(&s->gb, ptr, bit_length);